Auto-return pivot system for display apparatus

Abstract

An auto-return pivot system for a display apparatus is provided. The auto-return pivot system comprises a base fixed to an article; a pivot fixed to the base; a support pivotally mounted around the pivot for supporting the display apparatus; a cam device connected with the support to determine a stop angle and an auto-return angle between the article and the support; and a pressure-storing device connected with the cam device for storing a pressure to be applied to the cam device in the axial direction of the pivot; wherein the pressure from the pressure-storing device enables the cam device to drive the support to automatically return to a position with the stop angle when an angle between the article and the support is smaller than the auto-return angle.

1 . An auto-return pivot system for a display apparatus comprising:
 a base fixed to an article;   a pivot fixed to the base;   a support pivotally mounted around the pivot for supporting the display apparatus;   a cam device connected with the support to determine a stop angle and an auto-return angle between the article and the support; and   a pressure-storing device connected with the cam device for storing a pressure to be applied to the cam device in the axial direction of the pivot;   wherein the pressure from the pressure-storing device enables the cam device to drive the support to automatically return to a position with the stop angle when an angle between the article and the support is smaller than the auto-return angle.   
   
   
       2 . An auto-return pivot system according to  claim 1 , wherein the support has a pivoting shaft enabling the display apparatus to pivot in a direction different from a pivoting direction of the support. 
   
   
       3 . An auto-return pivot system according to  claim 1 , wherein the cam device is a cylindrical end cam. 
   
   
       4 . An auto-return pivot system according to  claim 3 , wherein the cylindrical end cam has a separable cylinder-shaped structure comprising:
 a pivotable part connected with the support for pivoting around the pivot; and   an unpivotable part connected with the pressure-storing device for moving along the axial direction of the pivot for receiving the pressure from the pressure-storing device.   
   
   
       5 . An auto-return pivot system according to  claim 4 , wherein the pivotable part and the unpivotable part have ends engaging with each other. 
   
   
       6 . An auto-return pivot system according to  claim 5 , wherein the respective ends includes at least two flat surfaces perpendicular to the axial direction of the cylinder-shaped structure, and at least one slant surface connecting the at least two flat surfaces. 
   
   
       7 . An auto-return pivot system according to  claim 6 , wherein the slant surface is a curved surface. 
   
   
       8 . An auto-return pivot system according to  claim 6 , wherein the cylindrical end cam drives the support to return to the position with the stop angle under continuously bearing the pressure from the pressure-storing device when the respective slant surfaces of the pivotable part and the unpivotable part are in a malposition. 
   
   
       9 . An auto-return pivot system according to  claim 1 , wherein the pressure-storing device is connected with the base. 
   
   
       10 . An auto-return pivot system according to  claim 1 , wherein the pressure-storing device is one selected from a group consisting of an elastic potential energy storing device, a spring, a gas pressure potential energy storing device, a magnetic potential energy storing device, an electromagnetic potential energy storing device, and a combination thereof. 
   
   
       11 . An auto-return pivot system according to  claim 1 , wherein the pressure-storing device stores an energy of the pressure from an effort applied by a user. 
   
   
       12 . An auto-return pivot system according to  claim 1 , wherein the display apparatus is one of a display screen and a projection apparatus. 
   
   
       13 . An auto-return pivot system according to  claim 1 , wherein the display apparatus is a display screen of an automobile. 
   
   
       14 . An auto-return pivot system according to  claim 1 , wherein the article is one selected from a group consisting of a seat back, a roof in a vehicle, a horizontal structure, a ceiling, a vertical structure and a wall. 
   
   
       15 . An auto-return pivot system for a display apparatus comprising:
 a pivot fixed to an article;   a support pivotally mounted around the pivot for supporting the display apparatus;   a pressure-storing device connected with the article; and   a cam device having a pivotable part connected with the support and an unpivotable part connected with the pressure-storing device for determining a stop angle and an auto-return angle between the article and the support;   wherein the pressure-storing device provides a pressure to the unpivotable part in the axial direction of the pivot, and enables the pivotable part to drive the support to return automatically from the auto-return angle to the stop angle.   
   
   
       16 . An auto-return pivot system according to  claim 15 , wherein the cam device is a cylindrical end cam. 
   
   
       17 . An auto-return pivot system according to  claim 16 , wherein the pivotable part and the unpivotable part of the cylindrical end cam are separable, and the unpivotable part bears the pressure from the pressure-storing device and moves along the axial direction of the pivot while the pivotable part pivots around the pivot. 
   
   
       18 . An auto-return pivot system according to  claim 17 , wherein the pivotable part and the unpivotable part of the cylindrical end cam have ends engaging with each other. 
   
   
       19 . An auto-return pivot system according to  claim 15 , wherein the cam device further determines a static angle between the article and the support, and the support is static in a position with the static angle. 
   
   
       20 . An auto-return pivot system for a display apparatus comprising:
 a pivot fixed to an article;   a support pivotally mounted around the pivot for supporting the display apparatus;   a pressure-storing device connected with the article; and   an auto-return apparatus connected with the support and the pressure-storing device for determining a stop angle and an auto-return angle between the article and the support;   wherein the pressure-storing device enables the auto-return apparatus to drive the support to automatically return to a position with the stop angle when an angle between the article and the support is smaller than the auto-return angle.